With regard to part of your green garden of the house is busy with real choice between wood and aluminum, and third choice - plastic pipe - is currently under development and may be cheaper than others.
Aluminum does not rust or rot, but it is generally agreed that it responds more to heat and cold than wood and therefore cools the greenhouse in the winter, my belief is that this is not a major factor. Aluminum ugly, it's hard work and is quite expensive. If you choose aluminum you really love your green garden of the house ready to buy.
Garden houses shall be constructed of green wood rot-resistant wood such as cedar, redwood, cypress 01. It is not necessary using wood or soft wood, which requires constant painting to prevent rot. The wood has a small disadvantage that it obscures more light than aluminum, but it looks nicer and you can work yourself. And a cedar garden green house should be as long as you last.
The choice of transparent film for green homes is between the three types of glass and plastics fiber reinforced, which is a transparent fiberglass, PVC plastic or acrylic modified, which is fairly sturdy polyethylene plastic and is vulnerable.
Glass lets in lots of light, looks good, lasts a long time, is rarely broken by the wind and can be easily repaired, but it is expensive and requires a solid framework to support the weight. Fiber reinforced plastic comes in large sheets, it is easy to install and requires no comprehensive monitoring. Also part of the heat of a warm sun rises, that's a very good thing. This does not allow as much light as glass and this is a serious disadvantage in the winter. It is flammable and will only last twenty years.
Modified PVC and acrylic are cheaper and give good light, but they only last five years and can be torn by a storm. Polyethylene is very inexpensive - about one tenth of the cost of glass - and transmit light very efficiently. But it will only be a year or two, and is easily torn by the storms. Transparent plastics are becoming very popular across the country, and while the plastics are cheap compared to glass, they are worth using. Glass is, of course, the best in the long run, but it represents a significant investment-today.
Good luck! - Brian Dick
I'm gardening for nearly 30 years and have successfully grown all of the asparagus zucchini. I recently met many excellent resources to help what to grow based on the nutrients are a source of each fruit, which really defines the secrets of good gardening and much more to decide. I am strongly of both products and best of all support, they are only available as an eBook, so they are ecologically sound. More information about these resources and access to my FREE Step 12 online courses at The Happy Gardener [http://www.thehappygardener.me]